Fa. Davis et al., ASYMMETRIC-SYNTHESIS AND REACTIONS OF CIS-N-(P-TOLUENESULFINYL)AZIRIDINE-2-CARBOXYLIC ACIDS, Journal of organic chemistry, 59(12), 1994, pp. 3243-3245
cis-Aziridine-2-carboxylic acids, 2, precursors of the difficult to pr
epare syn-beta-hydroxy-alpha-amino acid structural unit, are prepared
in high diastereomeric purity by a Darzens-type reaction of the lithiu
m enolate of methyl bromoacetate with enantiopure sulfinimines 1.